I read somewhere that the reason Dan Didio decided to outfit the 'premier' Justice League with Victorian Collars was because it symbolized their regalness and importance. For certain members who donned cowls like Batman and Flash the high collars were impractical but the idea is still there. They are like royalty among heroes. Subverted in the case of Wonder Woman who maintains this uniformity by wearing a V-style choker . Outside of the core league you don't see many characters, if any, who share this distinction. Then you have Nightwing.
Following the events of Final Crisis, Dick Grayson stepped into the role of his fallen mentor and introduced a new kind of Dark Knight. He led strong sales on Morrison's critically acclaimed Batman & Robin series and the brilliant final run of Detective Comics. As Batman, Dick ushered in what I like to call the Camelot Age of DC. Meaning, with the big 3 out of the picture legacy characters became increasingly prominent. Fresh faces populated the DCU and the status quo was shaken up once more. Dick eventually became leader of his own incarnation of JLA comprised of B/C-list heroes and represented a new generation. There were instances where old school veterans like Barry Allen and Hal Jordan, Green Arrow just to name a few returned from obscurity and helped out in Cry for Justice and Blackest Night. Other hard hitters were killed away during big events but DC compensated by bringing in similar, carbon copy heroes(Mon-El/Red Robin/Donna Troy etc), It wasn't long before continuity was reset again, kicking off what would become the new 52.
This time, DC had released 52 all-new number ones. Some were team books, others were limited series but the luckier ones were featured in solo titles. One such example involves my favorite hero of all time--Nightwing. Now. It may just be wishful thinking on my part, and who knows...I might be completely in the minority here. But I think DC hid a clever easter egg. I believe Dick Grayson was so highly praised by the general public before the reboot that Dan Didio/Jim Lee disguised their blessings in the form of.. yep, you heard it here first. The Justice League's prestigious high collar!!! It's clear how the V patterns crescendo off of the neckline, arms and legs. He is a rare case in that his costume does have the coveted v-neck. Is Nightwing secretly part of an exclusive group of elites? DC's subliminal "nod" to Grayson after milking his successes pre-reboot?
Go ahead, shoot me some pms and tell me if I'm right or if I'm right. I'd love to hear your input because it really does interest me. This is all in good fun, no need to lynch someone for having a theory!